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[Bug tree-optimization/60656] [4.8 regression] x86 vectorization produces wrong code
- From: "bernhard.kaindl at thalesgroup dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 09 Jun 2015 23:37:08 +0000
- Subject: [Bug tree-optimization/60656] [4.8 regression] x86 vectorization produces wrong code
- Auto-submitted: auto-generated
- References: <bug-60656-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60656
Bernhard Kaindl <bernhard.kaindl at thalesgroup dot com> changed:
What |Removed |Added
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CC| |bernhard.kaindl@thalesgroup
| |.com
--- Comment #15 from Bernhard Kaindl <bernhard.kaindl at thalesgroup dot com> ---
Confirmed:
* Fixed in: gcc-4.9.2 (release)
* NOT Fixed in: gcc-4.8.4 (release)
It seems indeed only i386, x32 and x86_64 (-m32, -mx32 and -m64) are affected.
-fopt-info-vec-note show that e.g. powerpc & powerpc64 don't vectorize the
loop.
The mainline fix from Comment #8 apples without fuzz and fixes this wrong code
issue in gcc-4.8.4.
Apply it for 4.8.5?